<?php

declare(strict_types=1);

namespace App\Tests\Unit\Logic\Essen\UseCase;

use App\Logic\Common\ClockInterface;
use App\Logic\Common\EventDispatcherInterface;
use App\Logic\Common\TransactionManagerInterface;
use App\Logic\Essen\Event\MahlzeitAdoptedEvent;
use App\Logic\Essen\Exception\MahlzeitNotFoundException;
use App\Logic\Essen\Manager\MahlzeitManagerInterface;
use App\Logic\Essen\Mapping\MahlzeitFactory;
use App\Logic\Essen\Model\Mahlzeit;
use App\Logic\Essen\Model\MahlzeitStatus;
use App\Logic\Essen\Model\Wochentag;
use App\Logic\Essen\UseCase\MahlzeitAdoptUseCase;
use PHPUnit\Framework\TestCase;

final class MahlzeitAdoptUseCaseTest extends TestCase
{
    private function tx(): TransactionManagerInterface
    {
        $tx = $this->createStub(TransactionManagerInterface::class);
        $tx->method('execute')->willReturnCallback(static fn (\Closure $work): mixed => $work());
        return $tx;
    }

    private function clock(): ClockInterface
    {
        $clock = $this->createStub(ClockInterface::class);
        $clock->method('now')->willReturn(new \DateTimeImmutable('2026-09-18 12:00:00'));
        return $clock;
    }

    public function testExecuteKopiertQuelleAlsNeuenGeplantEintrag(): void
    {
        $jetzt = new \DateTimeImmutable('2026-09-18 12:00:00');
        $quelle = new Mahlzeit(7, 'Bolognese', 'mit Parmesan', [Wochentag::Mo], 3, MahlzeitStatus::Gegessen, $jetzt, $jetzt, $jetzt);

        $manager = $this->createMock(MahlzeitManagerInterface::class);
        $manager->expects(self::once())->method('find')->with(7)->willReturn($quelle);
        $manager->expects(self::once())->method('create')->willReturnCallback(function (Mahlzeit $m) {
            // Neue, geplante Kopie: gleiche Inhalte, aber ohne gegessenAm und ohne ID.
            self::assertSame('Bolognese', $m->name);
            self::assertSame('mit Parmesan', $m->notiz);
            self::assertSame([Wochentag::Mo], $m->wochentage);
            self::assertSame(MahlzeitStatus::Geplant, $m->status);
            self::assertNull($m->gegessenAm);
            self::assertSame(0, $m->sortOrder);
            self::assertSame(0, $m->id);
            // Persistenz vergibt die neue ID.
            return $m->mitId(42);
        });

        $events = $this->createMock(EventDispatcherInterface::class);
        $events->expects(self::once())->method('dispatch')->with(
            self::equalTo(new MahlzeitAdoptedEvent(id: 42, name: 'Bolognese', quellId: 7)),
        );

        $useCase = new MahlzeitAdoptUseCase($this->tx(), $manager, new MahlzeitFactory(), $events, $this->clock());

        $response = $useCase->execute(7);

        self::assertSame(42, $response->id);
        self::assertSame('Bolognese', $response->name);
        self::assertSame(MahlzeitStatus::Geplant, $response->status);
        self::assertNull($response->gegessenAm);
    }

    public function testExecuteUnbekannteQuelleWirft404UndLegtNichtsAn(): void
    {
        $manager = $this->createMock(MahlzeitManagerInterface::class);
        $manager->method('find')->willThrowException(new MahlzeitNotFoundException(99));
        $manager->expects(self::never())->method('create');

        $events = $this->createMock(EventDispatcherInterface::class);
        $events->expects(self::never())->method('dispatch');

        $useCase = new MahlzeitAdoptUseCase($this->tx(), $manager, new MahlzeitFactory(), $events, $this->clock());

        $this->expectException(MahlzeitNotFoundException::class);

        try {
            $useCase->execute(99);
        } finally {
            // Erwartete Exception oben.
        }
    }
}